Coil handling device



April 0, 1940. L. WETTENGEL 2,198,644

0011: HANDLING DEVICE Filed NOV. 4, 19.57 5 Sheets-Sheet 1 MOZ W ATTORNEYS.

April 30, 1940- F@ L. WETTENGEL 2,198,644

con. HANDLING DEVICE Filed Nov. 4, 1937 5 Sheets-Sheet 2 FIGJO.

mmlllh ATTORNEYS April 30, 1940. F. L. WETTENGEL 2.1 44

COIL HANDLING DEVICE Filed Nov. 4, 1937 5 Sheets-Sheet 3 FIGJZ.

{I II ll SER ES SEE/ES S Fll U M MQMZZ April 30, 1940. F. WETTENG-ELCOIL HANDLING DEVICE Filed Nov. 4, 1937 5 Sheets-Sheet 4 April 30, 1940-F. L. WETTENGEL 2.198.644

COIL HANDLING DEVICE Filfid NOV. 4, 1937 5 Sheets-Sheet 5 252 225716.19. 3 m4 gig/09 242,

Patented Apr. 30, 1940 UNITED STATES PATENT OFFICE- z,19s,c44 I comHANDLING DEVICE Frank L. Wettengel, Pittsburgh, Pa. Application November4, 1937, Serial No. 172,814

23 Claims.

This invention relates to'improved means for removing magneticstrip-metal coils from collapsible coiler drums upon which thestrip-metal coils have been formed.

In the manufacturing of light plates, sheet steel, and tin-plate basesteel, 9. heavy, highly heated steel slab is rolled into steel ribbons.These hot steel ribbons, as they come from the hot rolling mills, arecomparatively thin approximately inch thick, and vary in width up to 90inches or over. They are hundreds of feet long. They are commerciallyknown as strip. This strip inits extended form occupies a great amountof space and is unwieldy. It must be shaped'into the simplest, mostcompact and convenient form possible, for handling and manipulation inthe various processes which follow the hot rolling. This convenient formis generally a hollow cylin-, der, the forming of which is the lastoperation in the hot rolling process. The hot hollow cylinders varyinlength and diameter with the particular strip dimensions and in thisform a strip is usually called a coil.

After the hot coil has cooled the strip is passed through variousprocessing operations such as pickling, cold rolling, normalizing,tempering, shearing, etc. These treatments require the strip in thecoils to be uncoiled, processed, and recoiled. This recoiling, which insome cases is under light tension and in other cases under heavytension, is done on a strip coiler, (also sometimes called strip reels,tension reels, blockers, etc.). Various forms thereof consistessentially of an overhung, cylindrical, collapsible drum, hereinaftercalled a coiler drum, having a suitable diameter and.

length to accommodate the maximum width of strip,

A strip coiler generally comprises a collapsible coiler drum rotatablymounted on a rotatable shaft, carried in bearings mounted in a driveframe, and driven by suitable gearing. The shaft with drum isgenerally-supported in the manner of a cantilever, by the bearings.The'process of forming a coil on a coiler drum is as follows.

with the empty coiler drum at rest and collapsed, the entering and ofthe strip is passed into a gripper slot in the drum which contains agripping device. A flap bridges the slot and is held open by springs. Abrake wheel is integral with the coiler drum and may be firmly held bybrake bands while the shaft is rotated by the gearing. This effects agripping of the entering end of the strip and the expansion of thecoiler drum, at the same time, due to cam action of the shaft inside thecoiler drum. The brake bands are then released and the coiling proceedswiththe first layer of the strip which is now under tension closing theflap. When the coil has been completed it is then necessary to bind ortie it to keep it from spring open spirally. The coil must thereafter beremoved from thecoiler drum so that another strip can be coiled.

The larger coils which weigh thousands of pounds are too heavy to beremoved by hand andmust be removed by a mechanical device called. a coilstripper. The brake wheel is gripped by the brake bands and the shaft isrotated in the oppositev direction, from the rotation employed whenexpanding as first mentioned, thereby collapsing the coilerdrum andreleasing the grip on the entering end of the strip in the slot. Whilethere are numerous types of coiler drums in use having different kindsof grippers without flaps, and various methods of collapsing the drum,the type having the flap is described as it is. most common and embodiesmost of the features common to the other types of coiler drums. Afterthe coiler .drum. is collapsed the coil is ready to be stripped.

.The various coil strippers now in use consist essentially ofa car withwheels running onguiding tracks, the car being traversed by an aircylinder or other means. Superimposed on this car and integral therewithisanbifurcatedyoke which closely fits the lower semi-circumference ofthe coiler drum. On this car is also mounted a cradle to lift the coilfree of the collapsed coiler drum and secondly to support the coil whilestripping.

Due to the variations in the coil diameters this, cradle must beadjustable in vertical height and powerful enough to lift the coil. Thisadjustment may be accomplished in various ways, such as by hydraulic oraircylinders, screws operated by worm or other gearing, levers,parallelmotion, or a combination of these devices; all power oper--ated. When stripping a coil by the strippers now in use, the coiler drummust be positioned with the flap in the upper semi-circumferencebecause, if it is positioned in the lower semi-circumference, the closefitting bifurcated yoke will prevent the flap from opening and willthereby clamp the entering end of the strip and hinder the stripping. Itwill also prevent the return of the stripper to its original positionbecause the bifurcated yoke will strike the flap which is held wide openby its springs.

The operation of the usual coil stripper is as follows: the coiler drumwith the coil coiled thereon having come to rest, the tying band issurface of the collapsed coiler drum, thereby jao fee

eliminating as much surface friction as possible between the coil andthe collapsed coiler drum as well as the friction of the entering end ofthe strip against the slot.-

The car with all its superimposed attachments is then moved away fromthe coiler drum. This movement causes the bifurcated yoke to push thecoil off of the coiler drum. This description has set forth the idealoperation but seldom in practice is this ideal realized due to variouscauses. The human element in elevating the cradle too high or not highenough causes undue friction, and various foreign obstructions such assteel slivers, etc., may get in the slot. Deformations of the'strip mayresult from the gripper jaws, surface irregularities in the coil, orcofler drum, or in the slot. It is not infrequent that the entering endof the strip is crumpled or buckled into wrinkles inside of the slot,thereby jamming and causing theinner layers of the coil to becomeextended telescopically. Such conditions reduce the internalcircumference of the coil and thereby clamp the collapsed coilerdrum'makingit very diilicult to remove the coil. This compels thesuspension of operations on all of the preceding processing equipment.No mechanical device has heretofore been devised that will alwayssatis-, factorfly remove the coil from the coiler drum and also alwaysmeet other essential requiree ments. 7

, Another unsurmountable objection to this type of equipment, especiallywhen working with small light coils, is due to the human element failingto arrest the powerful elevating force of the cradle at the properinstant with a resultant concentration of this lifting force on theshaft, the coil, and coiler drums, with a consequent bending of theshaft and serious damage tothe strip coiler.

After the coil is stripped and it is clear of the overhung-end of thedrum by several inches it is lifted off the stripper cradle by a crane,Some cradles are supported so the cradle with or without the coil willrotatearound its fulcrum which is located eccentrically with relation tothe vertical center line of the drum and cradle which are identical.This type of cradle is held in a horizontal position by a stop and istilted when the coil is clear of the coiler drum, by various me-lchanical devices usually by a roller which is an integral part of thecradle, engaging a wedge cam' due to the continued movement of the car.The

cradle thus tilted slightly past the horizontal position is held by astop and rolls the coil off onto the floor, a conveyor, or other meansto transport it for other processing. All of these opera: tions must becompleted and the stripper with its integral bifurcated yoke returnedinto its orig-, inal position adjacent the brake before operations canbe resumed. 'While the foregoing describes in general the art anddifficulties ofeoiling and stripping coils it will be obvious to thoseskilled in the art that there are numerous detail deviations from theabove.

One object of this invention is to provide anew method of and means forremoving or stripping coils from a strip coiler. provide means that iscapable of exerting very great as well as controllable holding forces.Still another object is to provide such a device which utilizes themagnetic forces of one or more electromagnets. A further object is toprovide a stripper which is relatively movable with respect to thecoiler. Another object is to arrange the stripper so that the coilerdrum may project through it. A still further object is to arrange thecoil stripper so that it may be energized in part or in whole. Yetanother object is to arrange the stripper so that it will not damage thecoils while other object is to provide an electrical control system.Other objects of the invention include the elimination of cylinders,motors, cams, shafts, gears, etc., previously deemed essential strippingelements- A further object is to provide means to hold the parts fixedin position.

' A further object is to provide ajcoil stripper with a tyingelectromagnet. Another object is to provide a coil stripper with amagnetic unloading cradle. A further object is to provide a verticalcoil stripper. Another object is to provide a magnetic unloading rollerconveyor cradle.

Another object is to avoid the difliculties existentin presentapparatus. Another object is to provide a magnetic coil stripper. Withthe object in view of eliminating the stripping difii culties outlinedand attaining the other objects hereinbefore mentioned, a magnetic coilstripper is devised in accordance with this invention which is simple indesign, sturdy in construction, economical to manufacture, install andmaintain, and operate, and which will pull the coil off of the coilerdrum. Other valuable advantages and novel features will be apparentfrom. the following detail description taken in conjunc tion with theaccompanying drawings. 7

In the drawings, wherein like numerals represent corresponding parts inthe various figures, Fig. 1 is a sectional side elevation of a coilerdrum with a magnetic coil stripper constructed in accordance .with thefeatures of the present invention. Fig. 2 is an end view partly insection taken on the line A-A of Fig. 1. v

Fig. 3 is a longitudinal vertical elevation partly in section showingthe energized coil stripper just before removing a coil. Fig. '4 isa'view similar to Fig. 3 but showing the coil stripper and coil removedfrom the strip coiler. Fig. 5' corresponds to a transverse verticalcross section substantially on the line BB of Fig. 4 showing the coilremoved from the coiler. Fig. 6 is a longi tudinal vertical elevationpartly in section show ing the coil stripped from the strip coiler andlowered upon the electromagnetic unloading cradle. Fig. 7 is atransverse vertical cross sec trunnioned to deliver the coil with itsaxis 'rotated'horizontal ly in any position up to approximately 120degrees away from the axis of the coiler drum. Fig. 10 is a view similarto Fig. 9

Another object is to r but trunnioned to deliver the coil with its axisrotated horizontally in any position on a complete circle. Fig. 11 is asectional plan view on line D'-D of either Fig. 9 or 10.

Fig. 12 is a schematic wiring and piping control diagram for thestripping, tying and unloading operations in Figs. 1 to 11 inclusivealso 19-20 and 21. Fig. 13 is a vertical elevation partly in sectionillustrating a magnetic coil stripper constructed in accordance with thepresent invention but mounted to strip a coil which has been a coiled ona drum having a vertical axis. Fig. 14'

is a topplan view of the equipment illustrated in Fig. 13. Fig. 15 is asection plan on the line E-E of Fig. 13. Fig. 16 is a' section plan viewon the line F-F of Fig. 13. I

Fig. 17 is a schematic wiring and piping control diagram for thestripping and tying operations in Figs. 13 to 16 inclusive. Fig. 18 is aschematic wiring diagram of the controller for operating the rotatingmotors shown in Figs. 91.0l1-; 13l4-l516l'1 and' 19. Fig. 19 is a planview of Fig. 10 in which the coil is rotated for delivery afterstripping. This plan shows a trough type roller conveyor for receivingthe coil also a magnetic unloading roller conveyor cradle. Fig. 20 is alarger scale transverse vertical cross section corresponding to a viewon the line G--G of Figs. 19 and 21 showing the electromagneticunloading roller conveyor cradle. Fig. 21 is a larger scale sideelevation partly in section on 'line H-H Fig. 19 with the rotating motorremoved. 1 In the embodiment of the invention herein illustrated, thereis provided a strip coiler comprising a collapsible strip coiler drumrotatably mounted on a rotatable shaft 3|, which is carried by bearings32 mounted in adrive frame 33, and driven by suitable gearing which isnot shown. The shaft 3| is supported by the bearings so as to provide acantileversuspension. The coiler drum is provided with a gripper slot.34 (see Fig. 2) which contains a gripping device. A flap 35 bridges theslot and is held open by springs. The strip coiler drum is provided witha brake wheel 36 which is integral with it and which may be firmly heldby brake bands.

When the brake bands areflrmly gripping the brake wheel, the drum willbeheld stationary while the shaft 3| is free to rotate. The rotation ofthe shaft effects a gripping of the entering end of a strip and anexpanding of the coiler drum 30 at the same time, the latter action inresponse to cam action of the shaft 3| inside of the coilerdrum. Afterthe coiler drum has been expanded and the strip has'been firmly grippedthe brake bands are then released and the coiling operation proceeds.The first layer or convolutionof the strip closes the flap 35 as in Fig.2. When the coiling operation is completed on the strip coiler drum, thecoil 31 remains formed on the coiler drum. After this the coil must beremoved. The brake wheel is again gripped by the brake bands and theshaft 3| is again rotated but in the opposite direction, to therebycollapse the coiler drum and release the gripping means at the enteringend of the strip. 1

The magnetic coil stripper includes a car 38 which is providedwithwheels 39 (or .slides in lieu of wheels) which are arranged torun'on the guide tracks 40. The car is arranged to be moved by a fluidcylinder 4| operated by air. liquid or other medium, or by other means.As shown it comprises the fluid'power means having the cylinder 4| withcontrol pipes 42 and l3 controlled by a four-way valve 44. The pistonbeing actuated by the power fluid, is connected to the car 38 by thecoupling plate 46 and piston rod 41. The piston rod is fastened to theplateby the threaded nuts 48 and 49. The car frame 33 is mounted onaxles 53 which rotate in bearing 5|. Superimposed on the car frame is arigid magnet support 52 carrying a coil stripping electromagnet 53. The.coil stripping electromagnet 53 is hollow or annular having a centralopening 54 and may be cylindrical or of other suitable shape.Furthermore the magnet may be a single large magnet or preferably agroup of individual magnets combinedly forming the larger magnet havingan internal diameter 55 slightly larger than the outside diameter of theexpanded coiler drum 30. The outside diameter of the'magnet is about thesame or is slightly larger than that of coil 31. positioned so its 'axis56 is concentric with the The coil stripping electromagnet 53 is axis 51of the coiler drum 30., The top portion 58 of the coil strippingelectromagnet 53 is Tpreferably constructed in sections so that one ormore sections in the top can be energized independently of the othersections. The combined magneticstrength, of all of the sections of thiscoil stripping magnet when energized, is sufiicient to sup-' port thelongest and heaviest coil 31, which may be made on the coiler, with theaxis of the coil held in a horizontal position and with theface of themagnet contacting the end face of the coil. The combined magnetic pullis great enough to create between the magnet face and the coil end acoefhcient of friction great enough to ho] thecoil rigidly in horizontalposition.

The one or more sections inthetop portion 58 of the coil strippingmagnet53 when energized to various degrees, without the balance of thesections, has suflicient magnetic pull to support various size coilswith their axis in a horizontal position. The co-efllcient of frictionbetween the coil end and face of the magnet when only these top sectionsare energized is not however, great enough to entirely overcome theforce of gravity and the coil will gradually slide down the face of themagnet withits axis in a horizontal position and its end in contact,withthe face of the coil stripping electromagnet. Also mounted onthiscar frame 38 in bearings 59 integral with the car frame is amagnetic unloading cradle 60 eccentricaily-mounted by its integral lugsGI and pivot shaft 62 oscillating in the bearings. The pivot shaft 62and the trough 63 of the cradle 60 are located parallel with andequidistant from the horizontal longitudinalaxis 51 of the coiler drum30 and the coaxial axis. of coil stripping electromagnet 53, as well asparal; lel with the longitudinal center line of the car frame 38. Thecradle is also located farenough away radially from the coiler drum axisso that it will clear the outside of the maximum diameter coil. Thelength of the cradleto its end 65 from end iimeasured away. from thecoil stripping electromagnet face is approximately as long as thelongest coil. The cradle is pivoted eccentrically with relation to thevertical center line 61 of thecoiler drum 30 and the apex 83 of themagnetic unloading cradle trough, due, to the pivot shaft 62 beingpositioned with its vertical center I the center of the pivot shaft 52,thus causing the 1 cradle to rotate clockwise until it abuts the upperT, face 1| of thecradle electromagnet 12 which is located on and securedto the car frame 38.

" This cradle electromagnet 12 serves two purposes: First, it acts as alimit stop for determining the clock-wise movement of the cradle so asto position the apex of the cradle trough and its 1 angular surfaces inthe same relative plane with respect to the vertical center line of thecoiler 1 drums 38; and secondly, it.is powerful enough 3 when energizedto hold the cradle and the heaviest coil resting on it,fin thisposition. When the i a weight of the coil is placed on the cradle, the

center of gravity shifts to the left of the pivot 1 shaft 62, and whenthe cradle unloading electro- 1 magnet 12 is then tie-energized, thecradle will tilt counter-clockwise due to the weight of the coil,,untilthe cradle contacts the stop 13. This automatic tilting rollsthe coiloff of the cradle 1 onto the floor 14 to the left in Fig. 2, or on to 1other means for transporting the coil.

With a short coil, the magnetic linesof force 5 from the electromagnet53 when contacting the end of the coil 31 will preveht the coil fromspringing open spirally, but on long coils the mag- 1 netic lines offorce generally will not penetrate entirely to the opposite end. Tocompensate for this effect and to prevent the opposite end of a longcoil from springing-open spirally, a binding or tying electromagnet 15is provided. When the coil stripping electromagnet 53 contacts the enddiameter.

" of p a coil 31 the tying electromagnet 15 will be over the coil, nearthe opposite end, longitudinal with, and far enough away radially fromthe coiler drum 38 to clear a, coil 31 of maximum This tyingelectromagnet 15 is pivotally (or'unii versally) suspended at 16 on theend of a supporting arm 11 which latter is pivoted at 18 in a i bracket19 secured upon the coil stripping electroplace.

magnet or upon any otherconvenient and suitable An adjustable spring 80is adjusted so the arm 11 with the tying electromagnet suspended securedto the arm at 8| and to the stripping therefrom is slightlyovercounterbalanced and is retained in a floating position. The-spring ismagnet at 82. A guide 83 is placed at the forward end of the tyingelectromagnet to help guide for carrying the tying electromagnet can beattached to a fixed support considerably above the coil 1 with the tyingelectromagnet hanging down as a pendant free to swing to the extremeposi- 1 tions which the,coil will occupy.

All of the heretofore described appurtenances are mounted on the carframe 38 and for all j practical purposes they operate as a unit or as 1integral parts with each other. i traversed on the car wheels 38, (orslides in lieu iof wheels), and guided by suitable tracks 40' As suchthey are I located parallel with and equidistant from the 1 axis of thecoiler drum. They arein such a position that the internal diameter ofthe coil strip- 1 ping electromagnet clears the expanded diameterof'thecoiler drum from end to end. Furthermore, the upper flange 84 ofthe track cooperates to prevent any unbalancing of the car. The

pneumatic or hydraulic cylinder 4|, (screw,

, collapses effect welding them together.

motor, or other means) provides, the means for traversing the magneticcoil stripper as previously described to contact the coil end and towithdraw the same to strip the coil. The stripper mechanism location isnecessarily determined by the coiler drum and maximum coil diameterwhich usually causes all ofthe under structureto be placed in a pit 89out of the way. I

Having briefly described the magnetic coil stripper, its sequence ofoperation is as follows: Figs. 1 and'2 show the stripper and cradle inidle position, none of the magnets being energized and therefore notconsuming power. The stripper is in the extreme position away from thecoiler drum. The coil 31 has just been completely coiled on the drum andis ready to be stripped. If desirable the stripper can be advanced closeto the overhung end of the coiler drum whilethe coiling is in progress.In Fig. 3 the coiler drum 30' and the coil 31 arejat rest and therotation is stopped in any position, for a coiler drum which Iconcentrically. The magnetic coil stripper has been moved until the coilstripping electromagnet 53 contacts the end of the coil 31.

The tying electromagnet 15 is then energized and pulled down until ittouches the upper remote cylindrical surface 31" ofcoil 31"and due tothe magnetic pull it clamps the coil firmly together to preventspiralexpansion.

The entire coil stripping electromagnet isnow energized thereby holdingthe coil in itsconcentric position; after which the coiler drum iscollapsed. Aetuating fluid under control of valve 44 is now admitted tocylinder 4| moving the entire, magnetic coil stripper, with the coil 31suspended from the face of the coil stripping electromagnet, to theright until the drive end 31 of the coil clears the overhung end 30 ofthe coiler drum, all as shown in Fig. 4. The coil 31 when contacting theface of the energized coil stripping electromagnet 53 becomes for allpractical purposes a solid mass, at the contacting end, due to themagnetic lines of force passing through the layers of steel or iron thustemporarily in prevents the coil from becoming extended telescopicallyand when the magnet coil stripper is being withdrawn it pulls the stripout of, the

gripper slot as well as the entire coil off of the coiler drum. It alsoprevents the outer layers of short. coils from springing open spirally.On long coils the tying electromagnet 15 has the same temporary effecton the opposite end of the coil thus preventing spiral expansion of thecoil :from' end to end and eliminating the necessity of tying the coilbeforeit is stripped; This tying can now be performed with the coilstripped as shown inFlg. 4 and after the tying is completed the tyingelectro-magnet 15 is'd'e-magnetized and returned to-its extreme radialposition by the counterbalance means.

If the coiler drum collapses eccentrically it is preferable to stop thedrum and immediately collapse it with the gripper slot and entering endof the strip in the lower semi-circumference thus allowing the maximumspace and clearance for stripping the entering end. With this exceptionthe sequence of operation is as above.

The cradle electro-magnet 12 is now energized thereby holding themagnetic unloading cradle 60 firmly in the position best shown'in Figs.

and 7. The space 85 between the cradle '68 and the outside diameter ofthe coil 31 is greater as the coil diameter decreases and may be as muchas six or eight inches. In order to prevent the This conditionminimumdiameter coils from dropping this distame the lower portion 86(see Fig. '12) only of the coil stripping electro-magnet 53 isde-energized. The one or more sections of the top remain magnetizedsufliciently to'hold the coil in a horizontal position but with areduced coeflicient of friction. This allows the coil to slowly slidedown along the face 8! v.(Fig. 6) of the coil stripping electro-magnet.The coil 31 is thereby gently lowered onto the cradle 60' as shown inFigs. 6 and 7. a

The crade electro-magnet I2 is now de-magnetized and the eccentric loaddue to the weight of the coil tips the cradle counterclockwise until itengages limit stop I3 and the coilis rolled off as shown in Fig. 8 ontothe floor 14 or'other means of transportation. As soon as the coil isoff of the cradle the latter returns to its original position becausethe side 88 (Fig. 8) on which the cradle electro-magnet armature I islocated is heavier than the opposite side. The stripper is now ready forthe next coil. The manner of controlling these operations will bedescribed hereinafter in connection with Fig. 12. The foregoingdescribes stripping, unloading, and deliver-v ing a coil with its axisparallel to the coiler drum axis. r

For unloading and delivering axcoil, with its axis rotated through ahorizontal angle up to approximately 120 degrees from the coiler drumaxis the coil stripper incorporating the features of this invention isarranged with the coil stripping electromagnet trunnioned in top andbottom bearings as shown in Fig. 9. I To deliver the coil at any angleup to a complete circle the magnet 53 must have an extended bottomtrunnion with bearings as shown in Figs. 1019 and 21. In each ofthesearrangements there is embodied a car frame 38 and other. equipmentsimilar to that previously describedexcept the cradle and cradleelectromagnet as previously described are omitted from the car 30. Y

In Fig. 9 the coil stripping electromagnet 53 is rotatably mounted'ontop and bottom trunnions 90 and 9| respectively, carried'in a bottombearing 92 integral with car frame 30, and in a top bearing 93 carriedby the top bearingsupport bracket 94 integral with the car frame anddiagonally attached to allow the coil stripping electromagnet 59agreater angle of rotation without interfering with support 94. Thetying electromagnet 15 is pivotally supported at I upon a lever armwhich is in the form of a bell crank-95. Itls pivoted at 96 upon abracket carried by the enlarged portion 91 of the upper trunnion. Theupper arm of the bell crank is connected by the adjustable spring 98 tothe extremity ofthe trunnion 90. In this manner the lever moves with thecoil magnet.

To effect rotation of the coil stripping electromagnet about the axis ofthe trunnion, a power drive is arranged. A worm wheel 99 is keyed at I00to the lower trunnion 9 I. This wheel is driven by the worm I0l carriedupon the drive. shaft I02. The drive shaft is driven by the motor I03through a gear trainof reducing gears, housed in the gear box I04. Themotor is appropriately fastened upon the 'car.38. A magneticallyoperated spring brake I05 isconnected to the outer end of the motorshaft I06 so thatthe spring normally holds the brake on. When the motoris operated an electromagnet I01 (Fig. 18) re- In Figs. -19 and 21 thecoil stripping electromagnet is rotatably mounted on one trunnion I08extended entirely on the bottom. Mounted on the top of the car frame 38is a top bearing brackt I 09 carrying top bearing II-0;. On the bottomis mounted bearing bracket I II carrying bottom bearing H2. The diameterand length of the trunnion I08 and the distance between the bearings H0and H2 issufficient to give the necessary stability and rigidity to thecoil strip- .ping electromagnet 53. Attached to trunnion I08 in Fig, ,10is a worm wheel 99 which in turn is driven by worm I M on drive shaftI02 driven from the geared motor I03 through gear, box I04 as previouslydescribed.- This gearing is more clearlyshown in Fig. 11. Necessarystops and brakes are provided for controlling the rotation of the coilstripping electromagnet with the suspended coil to the desired positionfor unloading. The rotation can be accomplished by other means such asordinary gearing,sprockets and chain, cylinders operating a rack andpinion attached to the trunnion or a combination of these means.

In the two arrangements shown in Figs. 9 and lotheangle of rotation forunloading is prede-- termined as shown in Fig. 19, which is a planviewof Fig. 10 (for Fig. 9 a similar arrangement would be shown) andshows the stripper car. 38 withdrawnto its extreme position with thecoil stripping electromagnet 53'rotated 90 degrees counterclockwise fromthe axis of the coiler drum 30. the dotted lines showing the positionofthe magnet before rotation.

. With the magnet in the rotated position as on the cradle trough facesto allow longitudinal movement. of the coil and making the. cradlesomewhat longer than the maximum coil length so the coil when beingrolled off will clear theends of the stationary conveyor, the magneticunloading roller conveyor cradle 253 is essentially the same as cradle 60-previously described-being trough shaped and having the dependingeccentric integral lugs 5| pivotally supporting the cradle by means ofthe pivot shaft02 upon supporting bearings 59 fastened on the floor 254of the pit. p I

The cradle has the usual magnet armature ,portion I0 formed on onesideand adapted to be acted upon by the lines of magnetic forcefrom the.cradle electromagnet I2.

Figure 20 is a section through the magnetic unloading roller conveyorcradle at (3-6: Figures 19, and 21 looking at the end of thecoil. Thecradle is heavieron the side having armature 10 so that it willreturn-tothe position indicated in Fig. 20 when a coil is not present upon it.,In unloading a limit stop 256 is arranged to determine the movement inthe other direction. Fig. 21 is an elevation partlyin section at H-HFig. 19 with the motor I03; removed. These two figures are on a largerscale and more clearly show the previously mentioned parts.

This magnetic unloadingroller conveyor cradle 253 can be locatedanywhere in the trough type conveyor flow line or if desired any numbercan be used; each placed at the various desired unfzo ' the rollers 258.

.coils to roll onto the floor.

loading locations. In Figs. 19 and 21 the magnetic unloading rollerconveyor cradle is located close to'the magnetic coil'stripper but farenough away to permit rotation of the coil stripping electromagnet 53 toits stripping position when the coil 31a is still resting on themagnetic unloading conveyor cradle 253. To close the gap between therotated coil stripping electromagnet 53 and the end of the cradle,rollers 258 are mounted on a support 259 attached to the car frame 38and bearing bracket I08. These rollers are practically a continuation ofthe trough type roller conveyor and will facilitatethe travel of coilsonto the magnetic unloading roller conveyor cradle and will preventshort coils from canting and jamming against the stripping magnet face.In case the cradle is located some distance from the stripper the rollersupport 253 for rollers 258 will be omitted from the stripper car andthe conveyor I 81a frame extended as a cantilever to support placed uponthem. A skid 251 placed at the magnetic unloading roller conveyor cradleallows the The principle of operation of the magnetic unloading rollerconveyor cradle for use in a' trough type conveyor flow line used inconnection with strippers where the coil is rotated from its strippingposition before being unloaded from the stripping electromagnet will beexactly the same as the magnetic unloading cradle 60 previouslydescribed and shown in Figs. 1 to '8. In the arrangements shown in Figs.9-10-19 and 21 the sequenceof operation is the same as previouslydescribed up to Fig. 4,. after'the tying electromagnet 15 has beenreturned to its extreme radial position. The next operation is differentand consists'in starting the geared motor I03, and

40 through the worm and worm wheel rotating the coil strippingelectromagnet 53 with the suspended coil 31 until it coincides with themagnetic unloading roller conveyor cradle and trough type conveyor, asheretofore described, which latter is locatedat the desired unloadingangle. The coil stripping electromagnet is now partially de-magnetizedas described with reference to FIg'ure'G v I proceed onthe conveyor I81a to another cradle 1 through fuse II8 to the fixed terminal II1. Av

for unloading.

Referring to Fig. 12 the wiring and piping control circuits intended foruse-with the magnetic coil strippers are shown. This system is,especially arranged for the controls to be used forthe devices shown inFigs. 1 to 11 inclusive, also Figs. 19, 20, and 21, the control for therotating motor I03 having'been omitted. The electrical supply is soindicated. One side of the line runs through the fuse II3 to the fixedterminal 4 of the'cutw out switch II5, which latter is arranged todisconnect the entire equipment from the power supply. The opposite sideof the line extends single throw switch having the blades H8 and H8,carries the circuits from the first namedterminals to the fixedterminals I20 and I'2I All of'the'magnets are connected to one side 01'the All rollers have anti-friction bearings and are strong enough tocarry the load 86 is connected by the conductors I24,- I26 and I21. Theunloading cradle magnet 12 is connected to it by the circuit I24, I26and I28- As heretofore mentioned the coil stripping electromagnet 53 isconstructed in sections so as to be capable of being energized tovarious degrees in order to prevent the minimum diameter coils frombeing dropped. This separation is indicated in Fig. 12'by the dividedannulus 53.- The upper third is indicated at 58 and the lower two thirdsat 86. As heretofore described, it is preferable .to energize the top 58and bottom- 86 of magnet coil 53 independently and variably. A returncircuit I29 extends from the top coil 58 to a contact I30 which placesthe top of the magnet in direct connection to the other side of the lineby the conductors I3I and I32, the movable blade I 33-completing thecircuit from I30 to I 3|.

In order to energize the magnet 58 to-various degrees; a series ofresistance elements I34 are arranged to be inserted. in series with themagnet by movingthe contact. blade I33 over the series of contacts I35.As the blade moves from right to from left to right it gradually cuts inmore and more resistance until the blade finally reaches the contactsI36 where the circuit is broken and it is held by thestop I31. Thecontacts I36 are dead contacts and are not included in any of thecircuits. The blade I33 being manually movable by means of a handle I38,remains against the stop I31 when the controller is not in use.

It will be noted that. the switch I33 is wide enough to cover any two ofthe contacts I30, I35, I36 and I38 at onetime. When the switch is in theextreme right hand position on dead contacts I36 both of the magnets 58and 86 are disconnected and consequently inactive. As the switch ismoved to the left a circuit is completed through the resistance I34 sothat a small amount of current is supplied to the upper magnet 58 only.As the switch blade I 33 continues to move to the left the varioussections of resistance are cut out until contact-I30 is reached, atwhich time all of the resistance is cut out-and the magnet 58 isoperated at full strength. Continued movement of the blade brings theblade into contact with thecontact I38. This contact is one terminal ofthe lower portion of the magnet'86 and is connected to that lowerportion 86 by means of a conductor I40. With the switch in the extremeleft-hand positionfithe magnet 53 is fully energized with both the upperand lower portions 58 and 86 energized from the contacts I30 and I38.

- The reverse movement of 'thejswitch arm I33 first breaks the circuitthrough contact I38-and thereby de-energizesthe lower portion 86 of thecoil stripping electromagnet 53. Continued movement gradually insertsresistance in the circult of the magnet 5.8Qthus energizing it to various decreasing amounts and allowing the coil 31 ently and atdifferent-times. The circuit for the tying electromagnet 15 returns byway of conductor I to a contact 142 of the switch I43. The latter has amovable contact arm I44 which is manually operable by means of thehandle I45. The movable contact I44 is connected to the return wire I32by means of the conductor I46. The circuit for the tying electromagnetis as follows: I20-422I2315-I4II42-I44-I46- I32-I2I With the switch I44in the position indicated, the tying electromagnet is completelyenergized while the cradle electromagnet 12 is deenergized. Movement ofthe switch'handle I45 to the right places the switch in engagement withthe neutral terminal I41 and disconnects the tying electromagnet fromthe circuit. Continued movement of the switch to the right then engagesthe switch arm with the contact I48, the latter being connected tothe'cradle magnet 12 by means of the conductor I48. In this position theswitch connects the cradle magnet to the power circuit and completelyenergizes'the magnet. The circuit in this instance is as follows:I26I22- I2I. When the switch is in the vertical position the contactterminals I48 and I42 are de-energized and the tying magnet and cradlemagnet are also de-energized.

It will now be understood that the cradle mag-- net and tying magnet areindependently energized and that their circuits are so arranged thatonly one of these magnets can be energized at one time. The upperportion of the coil stripping magnet may be energized in degreesgradually increasing the strength thereof and finally energizing thelower portion of the magnet also.

It will be readily appreciated that the elec-.

I trical control as described'in connection withFig'.

12 provides a control circuit for the stripping magnet 53, the tyingmagnet 16, and the cradle magnet 12; or in case the coil is rotated,forthe roller conveyor cradle magnet 12, all as shown in Figs. 1 to 11inclusive, 1920,and 21. The control for the rotating motor I63 will bedescribed hereinafter in connection withFlg. 18.

For operating the traversing cylinder 4| the pressure supply isconnected to a four-way valve 44 operated by handle I48. The front endof the cylinder H is connected to the valve by pipe 42 and the rear endof the cylinder is connected to the valve by the pipe 43. With the valvein the position shown, the pressure is in the front end of the cylinder4|, the back end being open to the exhaust I50 and the stripper iswithdrawn as shown in Figs.' 1, 4, 6, 9 and 10. By moving'the handle I46' to the left 90 degrees to the dotted position II, the pressure fromthe supply pipe I 52 is admitted to the back end and the front end isconnected to theexhaust. This will traverse the stripper forwardly tocontact the coil as shown in Fig. 3. With the handle in the verticalposition-I56 all ports of the four-way valve are closed and the stripperis stationary in the location it happened to be in when the valve portswere closed byplacing the handle in the vertical position. Fig. 12 asdrawn shows the magnet 63 with its parts 58 and 86, and the magnet 15,energized to fullstrength, andthe magnet 12 idle.

The foregoing description refers particularly to coils and coiler drumseach mounted with its axis horizontal. A magnetic coil" stripperconstructed in accordance with the present invention but arranged tostrip acoil which has been coiled upon a drum having a vertical'axis. isshown in Figs. 1E1, 14, 15' and 16. In'this arrangement (see Fig. 13)the collapsible coiler drum so is mounted with its vertical shaft 3|mounted in upper and lower bearings I51 and I58. all with their axesvertical in driveframe 33 and rotatably driven by suitable bevel gearI58, driven by pinion.l60 carried on shaft I6l and driven by gearedmotor I62. The latter has its geEr train in gear box I63. The brake 36as previously described is used. vThe coil stripping electromagnet I53is similar tocoil stripping electromagnet 58 previously described. Themagnet: I53 will be energized as a unit insteadof in sections and iskeyed at. I66 on plunger I54 and mounted in a floating position on theupper end of and secured to the plunger I54 so that the magnet axiscoincides with the axis of the coiler drum 30 and if desiredit can becounterbalanced by a weight I55.; 1

. The plunger I54 is rotatably and slidingly mounted in a top bearing-I64 and'bottom stuffing box bearing I65 with its axis vertical andparallel with the axis of the coiler drum 36 and shaft 3|. Bearing I64is secured to a part-of the stripper housing I61 on whichis alsoattached the fluid cylinder I68 carrying the stufling box bearing I65,the cylinder and bearing thus becoming an integral part of housing I61.

Cylinder I68 is used for. elevating the coil strip-r ping electromagnetI53 by way of the plunger I54 and a fluid medium controllably introducedinto a cylinder by the valve I68 having control handle I10. A spur gearI1I is keyed on plunger I54 in such a position that when the axis :ofthe coil stripping electromagnet I53 coincides with the" axis of thecoiler drum one'of. the toothspaces of the gear "I will mesh with acorresponding spline guide I12 integral with the er against rotation andguiding the magnet on an axis concentricwith that of the coiler drum.

At the top end of this spline guide I12 is a spur gear I13 which is thesame pitchvas; and meshes with gear I1I. Gear; I13 isv rotatably mountedand so arranged that the lower. end of stripper housing I61.therebylocking the plungits teeth will just clear the top end of thespline guide I12. When the gear I13 is at rest in proper rotary positionone of its teethwill coincide with and form Gear I13 is mounted on shaftI14; carried in upp'erand lower bearings I15 and I16, integral with thestripper housing I61, and is driven by a continuation of the splineguide inter-meshing gear I11 which with worm wheel 1 vided witha brakeI86 to hold. the motor when stopped and to quickly stop therotation.'The end of shaft I85 will be supported in a bearing I86. This geartrain and motor areprovided with suitable stopsand limit switches sorota,-

tion will be limited and so it will always be ar rested with one of theteeth .of gear 113 coinciding with spline guide I12. These -limitswitches may be adjustably positioned and arranged to be actuated by oneof the appropriate shafts or other parts.

.A tying electromagnet 15 is provided as previously described to,prevent I spiral expansion.

The rollerconveyor' I81 orother means trans ports the coil for otherprocessing.

The sequence of .vertical stripping is as follows: Theplunger-I54 isnormally extended with its integral parts into theelevated position andthe axes of both the coiler drum 30 and coil stripping electromagnet I53are concentric as in'Figs. 13 and 14. In this position the gear train:is

a at rest and locked with one of the tooth spaces of gear I1I- meshingwith a tooth'in gear I13 which in turn coincides :with spline guide I12thus arresting rotation and guiding the vertical movement ofv plungerI54 and all integral parts.

The forming of the-coil 317on: the coiler drum 30 has just beencompletedandthe coil is ready .to be removed or stripped. Actuatingpressure in cylinder I88 is now-exhausted allowing the plunger I54 withall integral parts to descend until the coil stripping electromagnet I53arrives at the lower position I53 (as shown-in Fig. 13 by dotted lines)contacting thetop of the The tying electromagnet 15is nearathe bottom ofthe coil and is 'now energized and assumes position -15' shown vin.dotted lines, the magnetism gripping the coil and preventing spiralexpansion.v l

The electromagnet in position I53 is, next energizedtherebygripping andfirmly and rigidly i so holding the coil 31. After the coiler drum 30has been collapsed, actuating pressure admitted to cylinder I68 raisingthe plunger I54 to the endwofits stroke which is limited when gear I1Icontacts bearing I84. The plunger carries with-itthe coil strippingelectromagnet and tying magnets, thus strippingthe coil from the coilerWith the magnet I53 in its extreme top position (see Fig. 13) the lowerend of the longest coil can clear the. topend of the coilerdrum 30'andthe coiling of the next coil can immediately vbe'started. 'Withthe'coil'in this top position the geared motor I83 is started. The motorvby the gear trains, see Figs. 15 and 16, operating worm I 82,

worm wheel I18, shaft I19, gears. I11, I13, and Ill, rotates the plungerI54 with all its component parts and the coil 31 attached to the coilstripping electromagnet I53, to a predetermined position I53a. (Seedotted lines in .Fig.--14.)

-At such point the coil axis coincides with the a center of a rollerconveyor I81 or other trans; portation means.- In this position a toothof gear I13 and a tooth space of gear I" will coincide with spline guideI12. Cylinder I68 is now exhausted lowering the plunger I54 and allintegral' -parts with the coil 31 until it rests on the roller conveyorI 81.v The coil is now tied,,the tyingelectromagnet 15 is nextde-magnetized,

' then-the coil stripping electromagnet I53 releases the coil and allowsit to proceed on the con-j veyor. 3 I I The plunger 154 with allits'p'arts but without thecoil 31, is then elevated'to its extreme positionf 'In this position it is then rotated by the geared motor and geartrain in the'opposite diwith thecontrol of the'horizontal type ofstrip-v per. In this case the coil stripping electromagnet I53 can becompletely energized and de-energized in one step because the coil-canbe lowered onto the conveyor I81 by the plunger I54 without any dangerof dropping the coil. Inthis figure the electrical power supply isindicated as in Figure l2,-one side of the line extending from theconductor I88 through the fuse I89 to one fixed terminal I90 of the maincut-out switch I9I, The opposite side of the line comes from the powersource by way of conductor I92, the fuse I93 and another fixedterminall94 of the cutout switch I9I. Thecut-out switch is operated byhandle I95 which moves the two switch blades I96 and I91 at the sametime, the blades being pivotally connected tothe fixed terminals of theswitch I98 and I99.

The electrical supply from the terminal I99 extends to the movable blade200 of the control switch. MI by a'conductor202. 'Iheswitch arm ismanually operated by a control handle 203 and ispivoted about the point204. The blade is arranged to move over agseries of contacts 205, 208,201, and 208. The switch when moved to the extreme right hand position,is limited in movement by means of the 'stop209 which holds the switchblade 200 upon the dead contacts 205, 206. vThe switch blade isbroad-enough to cover two, contacts at the same time. I a The terminalI98 is-connected by, means of a common conductor 2I0 with the coiltyingelectromagnet 15 and the coil stripping electromagnet I53 by theconductors 2 and 2I2 respectively. The return circuit fromthe strippingelectromagnet I53 is by means of a conductor 2I3 which connects themagnet to the terminal 208 of the switch 20I'. The return-conductorcompleting the circuit for the tying electromagnet 15 is the conductor2| 4 which terminates in the contact 201. If it is desired theseltwo,magnets -r may be operated from a single circuit.

7 In moving the switch from the right'hand-idle' position in acounterclockwise direction about its pivot, the switch blade 200 firstengages the con-- tact 201 and thereby energizes the tying electro- Vmagnet 15 by way of the following circuit:

I98. Continued movement of the switch to the left thereby causesit toengage the contact 208 with the resultingenergization of the'coilstripping, electromagnet I53. by way of the circuit: I99202--204--2002082 I 3I 53-2 I 2- 2 I 0- I98. With the switch in theextreme right hand position the two magnets are de-energizedand with theswitch in the extreme left hand position the two magnets are energized."Atthe intermediate pointthe coil stripping magnet is deencrgizedwhilethe tying electromagnet is-energized.

, For operating the plunger I54 by the cylinder I88, the pressuresupplyis controlled by means of the three-way valve I69havinganoperating the valve to theright 90 degrees, the valve handieassumes the dotted position I10 and brings the valve ports into aposition such that the pipe 2I-6 from the cylinder is connected to theexhaust pipe 2". Gravity will then cause the parts of the coil strippingmagnet to slowly fall into the lowermost position indicated by dottedlines in Fig. 13. With the valve handle I10 in an intermediate verticalposition between the two heretofore described extreme positions, all ofthe ports are closed and the plunger is held stationary in the positionat which it was located at the time the valve was moved into the neutralposition.

Fig. 18 is the wiring diagram for a manually operated controller foroperating the reversible motors I33 shown in Figs. 91011 and 19, andalso the motorsl53 in Figs. 13 to 17 inclusive, in which cases the motorrotates the coil after stripping. The controller for controlling thesemotors is preferably of. the well-known drum type having forward andreverse control from a neutral position. Under the words, Forward" andReverse are the series of numbers 1 to 5 inclusive with correspondingvertical dash lines, which represent the number of resistance steps inthe controller. The wide. and narrow rectangles 2I3, 250, 25I. etc.through which these vertical lines pass, represent the various movablecontact segments for cutting out the resistance or connecting thearmature, brake or limit switches, etc. in the circuits. The heavydiagonal lines 2 I 3 and horizontal lines 220 are conductors which jointhe contact segments making practically one conductor out of each groupof contact segments. These segments are actually mounted on acylindrical drum but for ease of explanation are indicated in thediagram as if the cylindrical surface were unrolled and laid on a fiatsurface. The contact fingers A to F inclusive, LI, and RI to R5represent fixed contact fingers which can be connected to each other bymeans of the segments on the drum controller. The heavy lines R at theleft of the numbers RI, to R5, inclusive, will be the startingresistance in the-circuit. The series brake Ill and the series field areso marked with the armature of the motor represented by the word "Arm.The limit switch, forward 22I and reverse 222 are normally closedswitches and the limit switch 223 is normally opened. The four fixedlimit switch contact fingers 224, 225, 225 and 221 are positioned in thetop of the drum controller. The magnetically operated contactor 228 is aswitch which is normally opened but which is closed by an electromagnet.229 when the latter is energized by current passing throug it.

The requirements of these rotating motors which are controlled by theabove described con troller are as follows:

First, the motor must be locked when idle to prevent rotation. This isaccomplished by series brakes I05 and I85 which are operated by springsfor braking and released by an electromagnet, I01. Second, it must beimpossible to start the motor until the horizontal stripper 53 has beenentirely. withdrawn, or the vertical stripper plunger I54 has beenextended to its extreme position. This is to prevent starting of themotor which would rotate the stripper magnet with the coil attached whenpartly oil of the drum 30. To fulfill this second motor requirement, thelimit switch 223 which is normally open is placed in such a positionthat the car body 38 (see especially Figs. 9-10-11 and 19) willcontactit to close its circuit at the. end of the movement of the car 35away from the coiler drum. Similarly, in the arrangement shown in Figs.13 and 17 the gear I'll or the top end of the plunger I54 will operateacontact and close the limit switch 223 when the plunger I54 is atv theend of its upward stroke. If the equipment is not withdrawn or elevatedin extreme position the limit switch 223 would'be open, and the circuitto'the magnetic contactor would be open. There would be no magnetism toclose the magnetic contactor and the main circuit would remain open. Themotor and control equipment would not operate thereby fulfilling thesecond requirement- Third, the motor mustalways stop at the samepredetermined position so that the coil will coincide with the magneticunloading roller conveyor cradle 253 and conveyor 181a (Fig. 19) orconveyor I81 (Fig. 14) onto which it is to be unloaded. To

fulfill this requirement, the limit switch 22I which is normally closed,is so positioned that its circuit is opened thus de-magnetinng themagnet 223 of the magnetic contactor 228 breaking' the main circuit andstopping the motor when the coil stripping electromagnet 53 (Fig. 19)has been rotated by its trunnion and has arrived at its unloadingposition'or electromagnet I53 has been rotated about the axis of theplunger I54 and has arrived atits appropriate unloading position. Thislatter would be indicated, for example, in Fig. 14 by the dotted lineposition of the magnet I53a. The fourthrequirement is that the motormust rotate forward to deliver the coil to its unloading position andmust reverse to bring the coil stripping electromagnet 53 or I53 back toits initial position. This requirement is fulfilled by the controllerconnections. The fifth-requirement is that the motor must stop when theaxes of both the coil stripping electromagnet 53 or I53 and coiler drum30 coincide. This requirement is attained by placing the limit switch222, which is normally closed, so that its circuit is opened when theaxes of the drum and stripping magnet coincide and the operation is thesame as-limit switch 22I.

The motor for accomplishing these purpose is preferably a serieswoundmotor having a series brake in the circuit. Fig. 18 is a wiringdiagram which will meet all of the foregoing requirements The operationof this controller will now be described. The power supply goes throughthe main switch 23I to its terminals 232 and 233. A

conductor 234 from the latter goes to contact finger LI of the drumcontroller. The other line terminal goes by conductor 235 to thecontacts 223 'ofthe magnetic contactor, then by line 238 to the blow outcoils and by conductor 231 to terminal B. The motor armature isconnected.

vanced Forward connecting LI, to RI, B to C and E to F, also the twolowerlimit switchcontacts 225 and 221 by segment 23!! at the top oi thedrum.

This causes current to flow through limit switch 223 and forward limitswitch 22I to the two lower limit switch contacts 225 and 221 which arenow connected to the magnet 223 of contactor 223 and to the mainline233. This circuit is from the line terminal 233, to line 234, contact LIsegment 2I9, contact RI, conductor 243, limit switch 223, conductor 244,forward limit switch 22I, line 245, contacts 225, 230, and 221, line245, magnet coil 22!, conductor 241, to line 235to terminal 232., Themagnetic contactor is 1m mediately closed by its electromagnet tocomplete the main circuit. This main circuit follows: terminal238-234'Lisegments- 2I9- R lR,248-brake lll'I-fleld-conductor 249Esegments 2l0--F-240'238arm24l-C Continued advancing of segments cutsout resistance Rl to R3 when the top segment contacts R! with the otherconnections remaining the same. This will cause the main current to.flow

as follows: Ll to R5, through the series brake releasing its hold,through series field, to E, to F,

to arm,-to C to B through blow out coils-magnetic contactor, and to themain supply line.

This'rotates the motor in'the forward direction until the circuit in theforward limit switch 22! is broken by the stripping electromagnetreaching its unloading position which cuts 'off the current to themagnetic contactor opening the main line and setting the brake.

To bring the equipment back the reverse segments of the drum areadvanced connecting Ll with RI, A to B, D to E, and the two top limit-switch contacts 224' and 225 by segment" 2l8.

Current now flows from RI through 223 and reverse limit switch 222 tothe upper two limit. switch contacts 224 and 225, to the magnet 229 ofcontactor' 228 and the circuit is completed.

This control circuit is as follows: 233234Ll-- 2 l9--RJ243223"-244-222.2522242 l8- 225--221-248229241235-232. This operates themagnetic contactor' 229 for reverse rotationclosing the motor circuitthrough contacts 223. This circuit is as follows: 233234'Li- 2 I 3-RI-R-243l lll-fleld-249E-li'D --242=-C 24 I -arm--238239--A-25I '-B-23'I-blow out coils236228235-232. Con- I tinued advance of the reverseconnectors cuts out all resistance R with the current flowing as fol- Q40 lows: Ll to R5, to series brake, to field, to E, to n,

to C, to arm, to A, to B, blow out coils, to magnetic'contactor andmainline 232.

This changes the direction of the current in .the armature and reversesthe motor until the reverse limit switch 222 opens its circuit whichcuts off the: current to the magnetic contactor opening the main lineand setting the brake as before. r I

It will now be appreciated that the magnetic coilstripper hereindescribed is useful and has manyiadvantages among which are: The coil ispulled off-of the coiler drum instead of being can proceed asit is notnecessary to wait until the previous coil is unloaded and the stripperre turned to its original position. The 0011- can be tied while the nextstrip is being coiled. The space formerly occupied by a bifurcated yokecan now be occupied by strip thus allowing. a shorter length coiler-drumfor a. given width of strip, which makes thecoiler drum more rigid dueto less overhang. The stripper can deliver the coil with its axis in ahorizontal plane at any desired angle to the coiler drum axis; A coilcan be stripped from a coiler having its drum and shaft mountedvertically. with the prior .art type strippers this was impossible.

There are no moving parts requiredfor gripping, attaching or holding thecoil to the stripping mechanism and therefore nothing to get out oforder. The entire mechanism is of the simplest design containing theminimum number. of-

proven practicalparts none of which can be damaged or which can damageother equipment or the coil even, if improperly operated by aninexperienced operator. It is evident the upkeep and operating cost willbe small. Practically no skill is required to operate the device. On thepresent types of coil strippers most of which employ coil liftingcylinders which are traversed by the car, the method of supplying theliquid or air pressure to the cylinder is by means of telescopic pipeconnections, swivel orflexible pipe Joint connections, or by a flexiblehose all of which must operate under high pressure and are a constantsource of trouble and upkeep 20 cost. With the magneticcoil stripper allenergy for operating the tying electromagnet; .for'unreleasing thecradle to roll thecoiloif, is electrical and is supplied by anelectrical conductor thus eliminating leaking liquid and hissing air.

have been herein illustrated and described, it

will be understood,'howevergthat changes in the construction andoperation of the parts may be made without departing either from thetrue spirit or scope of the invention. These variations are to claims.

What I claim is: r

be determined from the appended loading the coil onto the cradle; forholding or 1. In combination; a collapsible strip metal v coiler, and acoil stripper having electro-magnetic means for adhering to a coil ofmagnetic strip metal at an end of the coil for bodily removing thelatter from the coiler without distortion.

2. The combination with a collapsible strip coiler drum of a coilstripperv relatively movable with respect thereto and including meansfor gripping by magnetic attractiona coil carried on said coiler drumfor bodily removing said. coil from the drum longitudinally with respectto the axis of the drum.

3. The combination with a collapsible substantially cylindrical stripcoiler of a magnetic coil stripper including magnetic means arranged insubstantiallyannular form and adapted tocircumscribe the cylindricalstrip coiler when the latter is in either collapsed or expandedposition.

4. The combination with a collapsible substantially cylindrical stripcoiler of a magnetic coil stripper including magnetic means arranged insubstantially annular form and adapted to circumscribe thecylindrical'strip coiler in either collapsed or expanded position, saidmagnet means comprisingone or more electromagnets.

5. In combination, a collapsible strip metal coiling drum, a coilstripper including magnetic means of substantially annular form adaptedfor gripping a coil coiled on the drum, the axes of said means and drumbeing in alignment, means for moving the stripper relatively to the drumand coil to provide for said magnetic means, establishing grippingrelation with respect to the coil for removing the latter from the drum,and means arranged to controllably de-energize said magnetic means forgradually releasing the gripped coil therefrom after the coil has beenremoved from the drum.

6. The combination of a. collapsible strip metal coiling drum, anannular magnetic stripper for gripping, by magnetic attraction the coilon and for stripping it bodily from the drum, said stripper includingportions capable of being selectively energized and de-energized, saiddrum having its axis horizontally aligned with the axis of the stripper,and said stripper including a controllable'electric circuit forselectively energizing and de-energizing saidportions to release thegripped coil. l

'7. The combination of a collapsible metal strip coiling drum, avertically disposed, shiftable magnetic coil stripper, said drum havingthe axis thereof substantially horizontally aligned with the axis ofsaidstripper, said stripper including magnetic means of annular formprovided with a co-planar'surface adapted to grip by magneticattraction, one end of a'coil wound on the drum for bodily removing itfromsthe drum by shifting the stripper in one direction of its movement,and controllableelectrical circuit means for alternately intermittentlyenergizing and de-energizing said magneticmeans to provide for thegripped stripped coil to gradually slide down oif of said surface; 3 I r8.. A magnetic coil stripper comprising amobile support, one or morecoil stripping electromagnets mounted on the support andarranged withthe magneticfaces thereof in the same vertical plane, the said supporthavinga hollow cen- 4 .tral portion of larger radius'than and adapted tobe disposed in concentric encircling relation and at right angles to anexpanded coiler drum, said support being so formed andadapted to be soarranged relatively/to the coiler'drum' thatthe said magnetic means, canbe advanced longitudinallyover the coiler drum to contact the ends ofcoils formed from different width metal strips.

9. The combination with a collapsible strip coiler, having the axis ofits drum horizontal; of a magnetic coil-stripper having a strippingelectromagnet of annular form and having its axis disposed coaxiallywith the axis of the drum and including a plurality of sections with thetop sections thereof energizable with orindependently of the othersections. I

10. In combination a collapsible strip coiler, a.

magnetic coil stripper having a coil stripping: electromagnet which cancontact one end of a coil, and'a tying electromagnet arranged whenenergized to contact the cylindrical surface of the coil; at theopposite end whereby to prevent spiral expanision and uncoiling of thecoil.

11. In combination a collapsible strip metal coiling drum, a coilstripper having astripping magnet arrangedfor relative co-axial movementwith respect to and alongthe axis of said drum, 9. tying magnet arrangedfor radial movement and longitudinal movement with respect to said drum,and meansarranged to simiultaneously move said magnets with respect tosaid drum.

12. In combination a collapsible strip" metal coiling drum, a fioatinglysuspended pendantlike electromagnet arranged for radial: andlongitudinal movement with respect to said drum, said magnet disposedfor contacting the outer cylindrical surface of a coil and whenenergized, ar-

ranged to clamp the convolutions and prevent 11-1 13. In combination acollapsible strip metal coiling drum,'a coil stripper having a strippingmagnet arranged for relative co axialmovement with respect to said drum,a tying magnet arrangedfor relative radial movement and 'longi- Itudinal movement with respect to said drum, and

means arranged to simultaneously move said magnets with respect to saiddrum, saidlast named means including a" carriage for'said magnets andpower operated means formoving the carriage. i i i 14. In a coilhandling device for removing and transporting a coil from'a'coil-former, said de-, vice comprising a mobile combinedcoilstripping, suspending, releasing, receiving and dumping structuretherefor comprising the combination of a'caradaptedtobe shifted to aposition under the coil on the 'coil-formerand from such posi tion, a;combined gravity operated electrically controlled coil receiving and,dumping cradlesecuredto and disposedover a portion of the top of thecarysaid cradle .being trough-shaped and eccentrically pivotedunderneath, longitudinally with relation to the trough apex andoverbalanced on the pivot sideofsaid apex to cause pivotal rotation ofthe cradle opposite to normal rotation' due to the eccentric location ofsaid pivot, a stop on the overbalance'dfside pfithe cradle forrestricting said'rotation and disposed w normally maintain the cradleina horizontal 30 position, a stopon the car disposed on the opposite sideof the pivot to restrict pivotaljrotation of the cradle opposite to thatcaused by the over? balance, a coil stripper for the'coil carried bysaid car atfthe rear end of. the cradle including asupport providedwithfmagnetic means, respectivelyadapted to grip one end'of the'coiljwhen the car is positionedunder the coil-former and to bodilyremove the coil from on said coil-former when the car is shifted fromunder the coilformer'whereby the coil will be suspended over the cradle,electric means carried by, the carand co-acting with the stop on theoverbalanced side of the cradle for controlling the pivoting movement ofthecradle in a direction for dumping the coilfand means tor controllingthe magnetic. means to provide for thelowerin'g'of the coil} from itssuspended position into thecradle for dumping. e i

15 In a coil handling device for removing and transporting a coil from acoil former, saiddee vice comprising a mobile combined coil stripping,tying, suspending, releasing, receiving and dump ingstructure formed of.a car adapted to be shifted to a position under the coil on the coilformer and from such position, a gravity opera ated electricallycontrolled coil receiving and dumping cradleidisposed over a portion ofthe top of the-car, means forpivotally connecting the,

cradle, eccentrically of the latter to the top of the car, a stripperfor the coil consisting of an.

upstanding supportseciired to said car rear:

wardly jofpthe cradle carrying magnetic means suspended over thecar andrespectively adapted to grip one end of the coil, when the car ispositioned underthe coil-former and to bodily strip the coil from offsaid coil-formerwhen the car is shifted from under thecoil-formenwhereby the coil willbe suspended over the cradle, a'mag:netic coil tying means for the coil suspended over the cradlefrom saidstripper and adapted to en,- gage the coil to prevent theuncoilingtliereof when the, coil is bodily carried by the magnetic means,meansfor controllingthe stripperv and tying means to provide for theloweringotfthe coilirom its suspended position intothe cradle iordumping; and said cradle and car :havingcoacting magnetically controlledmeans for controlling'the dumping movement ,joi' the cradle when thecoil is deposited thereon. j

' ,.16. In a coil handling device-of thattype including a coil formingmandrel; the, combination of a carriage arranged for relative movementswith respect to the mandrel; power operated means .for eiiecting saidrelative movement, a coil strippingelectro-magnetsecured toandbodily'moving with said carriage and arrangedto grip the end 01 aiormed coilgby magnetic attraction for bodily stripping the, coiliromoil the mandrel; a tying electro-magnet arranged to clamp the coilconvolutions secured to, extended forwardly from and bodily moving withthe stripping magnet; and an electro-magnetically controlled coil.receiving, holding and dumping cradle secured to and bodily movingwiththe carriage,

said cradle being arranged on the carriage below the coil tying magnetand forwardly of the stripping magnet.

am combination," a calmness metal coiling drumga magnetic coil stripperarranged i'orfrelative movement with respect to said coiler drum andhavingjinagnetic stripping means for bodilyremoving the. soil from thedrum, a tying magnetic means bodily? carried by saidstripper andarranged for relative movement with-respect to the periphery oi the coilwhen the latter is on said drum, power means arranged to simultane:ouslycontrollably' move said stripper and its magneticmeans relativelywith respect to. said drum; and control means for cooperatively andindependently controlling said stripper and said tyingnieans. a 18.Thecombination witha collapsible strip metal coiling drum, of a magneticcoil stripper 4. including a carriage having a stripping. magnet oiannular form carried therebyon vertical .trunnions and rotatablejinbearings mounted on said carriage so that the magnet-may beconcentrically positioned'with respect to said drum, a'tying magnetsupported thereon, said stripper arranged for relative movement withrespect to said drum, and means arranged to move said stripper withrespect to said drum.

19. In combination a collapsible strip metal coiling drum, amagneticcoil stripper including a carriage and having a stripping magnet 01annular form co-axial with saiddrum and carriedon one or two verticaltrunnions; bearings mounted on said carriage and rotatably support ingsaid trunnions, a tying magnet supported on said stripping magnet,,andpower operated means arranged to Jointly rotate said magnets until thestripping magnet axis extends in a predetermined angular directionwithvrespecttc the axisoi said drum c 20. In a coilhandlingrdevice'adaptedior use in conjunction with a coil formed onasheet I metal' strip coiler, the combination .of a car hav in'gvertical bearings mounted thereon, a, coil stripper connected with andbodily movable with the car and including an annular coil strippingmagnet arranged to grip an end of the coil on the coiler by magneticattraction when moved in one direction of travel of the carand in'theother direction of travel 01 the car to bodily strip the coil from oilthe coiler, said stripper being formed with vertical trunnions rotatablymounted in said vertical bearings and arranged to rotate the mag-jnct'with'the stripped'ofl' coil thereon to a position for dischargeoithe coil locatedat-ngpohit where 2,198,644 v H v the axis of themagnet is at a determinable angle lapsible strip metal coilingdrum-working on a vertical axis, a magnetic coil stripper including atying electromagnet and a stripping electromagnet, the latter being'of'substantially annular form and adapted to circumscribe the expandedcoiler drum', said stripping electromagnet being mountedon a plungerdisposedforavertical movement in a guiding bearing with the coilcontacting faceof the magnet-positioned'in. a horizontal plane, and acylinder for the plunger and in which saidplungeris movedbyfluidpressure, 22. In combination astrip coiler having a col strippercomprising a stripping magnet of annular form mounted, tor-relativevertical co-axial movement with respect to said drum, on 9, plunger.

disposed for-limited vertical and limited rotary movement, in a fluidpressure'operating cylinder, said cylinder and a guiding-bearing bothmounted on a supporting housing, a gear attached-"tolthe with atoothspace oi said gear slidingly meshing plunger, a spline guideattached tolsaid housing t therewith, the axis of-said guide beingparallel with the plunger and drumaxes to produce the aforesaidco-axialmovement, said gearwhen con-'- tacting the guiding bearingarranged to' limit verticalmovement, a power driven gear disposed with atooth forming a continuation oi said spline c guide arranged to rotatethe plunger and stripping magnet is a predetermined directionpandelectrical means to limit said rotation.

23,. A magnetic coil stripper comprising a housing carrying a cylinderand plunger arranged for. relative vertical and rotary movement withrespect to a substantially vertical coil forming mandrel, power operatedmeans mounted on the housing to eiiect said rotary movement, controlmeans to efl'ect said relative vertical movement, a coil strippingmagnet of substantially annular i'orm mounted on the plunger and a tyingmagnet suspended therefrom, control means to control the tying magnetand the stripping-magnet for stripping the coil from the mandrel andunload ing the coil after rotation, electric control-means includinglimit switches cooperating with said plunger: and the rotated strippingmagnet for controlling saidpower operated means. 1

' '24. Incombination a collapsible strip metal coiling drum,'a coilstripper arranged for relative movement with respect to said coiler drumand having magnetic strippingmeans, a tying magnet means arrangedformovement with respect to said drum; power means arranged tocontrollably move said stripper and its magnetic means with .respect tosaiddrum; and control cooperatively and also independently controllingthe drum, the stripper, the power; means.

25. In combination-n collapsible stripnmetal 'coiling,.;drnm,;a coilstripper havinggalmagnet arn-angedfi'orrflative movement withrespecttosaid Edrurma tying magnet arranged for relative move--75- the magneticmeans, and

25' lapsible strip metalcoiling a magnetic coil ment with respect tosaid drum, and means arranged to move said magnets with respect to saiddrum and to release a coil from the magnets with the axis of the coilextending in a predetermined direction with respect to the axis of saiddrum.

26. In a coil handling device for a coil formed on a collapsible metalstrip coiling drum, the combination of a gravity operated, eccentricallypivoted, coil receiving, holding and dumping cradle, a cradle holdingmagnet and a cradle limit stop, both arranged to limit opposite pivotalmovements of the cradle, said cradle, when unloaded normally held frommovement by said magnet and tending to move towards said stop whenunbalanced on the reception of the coil, a coil stripping magnetarranged relatively to the cradle for gripping the coil on the drum,bodily stripping the coil from the drum and suspending the coil over thecradle, means common to the cradle and stripping magnet for bodilymoving them in unison towards and from the drum to provide for thestripping magnet gripping, stripping and suspending the coil, andcontrolling means common to the cradle magnet and stripping magnet toprovide for the suspended coil to gradually slide down relatively to thestripping magnet onto the cradle and to de-energize the cradle magnet toprovide for the automatic dumping of the coil from the cradle.

27. A coil stripper comprising a carriage arranged for relative movementwith respect to a coil forming mandrel, power operated means foreffecting said relative movement, a coil stripping electromagnet carriedon said carriage and arranged to grip a formed coil by magneticattraction, power operated means arranged to unload a coil from thestripper, and electrical control means including limit switchescooperating with said carriage for controlling the operation of saidpower operated means.

28. In a coiling handling device of that type including a coil receiver,the combination of a collapsible metal strip coiler, and a mobile coilstripping electromagnet of annular form arranged on one direction of itsmovement to grip one end of the coil by magnetic attraction and .onanother direction of its movement to bodily strip the coil from ofi thecoiler for suspending it over the receiver. said coiler and magnethaving their axes, co-axial.

29. In a coiling handling device of that type including a coilreceiver,the combination of a collapsible metal strip coiler and a mobile coilstripping electro-magnet of annular form arranged on one direction ofits movement to grip one end oi the coil by magnetic attraction and onanother direction of its movement to bodily strip the coil from off thecoiler i'or suspending it over the receiver, said coiler and magnethaving their axes co-axial, and controlling means for said magnet toprovide for the gradually lowering of the suspended coil into thereceiver.

